[boulos]

If your employer offers a 401k with a match, you should do it.

To invest outside of an employer fund, you can open an account with any number of firms, but many folks like Vanguard: they have low fees and aren’t trying to up sell you.

There’s a vibrant community at bogleheads.org (their wiki is probably more useful, e.g., the three-fund portfolio). I think there’s a subreddit at r/personalfinance or something that’s reasonable as well.

As others are saying: use simple index funds, maybe even start with just a target date fund if you aren’t comfortable building your own portfolio.